Fireproof construction.



Nu. @42,36. Patented 1an. 30, |900.

J. H. LAING.

FIBEPROF CONSTRUCTION.

(Application led Mar. 23, 1899.)

(No Model.)

E' @ya JOHN Il. LAlNG, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF TVVO-THRDS TO PEROY (l. HAMILTON AND ALEXANDER DIOKEY, OF SAME PLACE.

FIREPROOF CONSTRUCTlON.

SPECFICATIN forming part of Letters Patent No. 642,136, dated January 30, 1900.

Application filed March 23, 1899.

To all whom, t 77ml/ concern.-

Be it known that l, JOHN l-I. LAING, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented new and useful lmprovements in Fireproof Construction, of which the following is a specification.

This invention relates to improvements in reproof construction of buildings; and the Io object of the same is to obviate the expense of false work and reduce the amount of structural iron usually required by providing a lintel of exceptional strength having full carrying capacity over as wide bays as may be prudent to space the beams and which may be rapidly erected and completed ready for laying of flooring without using plastic cement, whereby the cost is greatly reduced with gain rather than loss of strength over zo modes now in vogue and Without the necessity of mixing and working cement at the building and enabling the work to progress at all seasons of the year.

One of the most usual forms of iireprooting consists of a series of short-length terra-cotta tile cemented together in arch form from beam to beam. The spans are necessarily short, as the tensile and compressive strength of the material is limited, thus necessitating the erect-ion of beams at frequent intervals. Another form consists of a concrete filling between beams in conjunction with transverse bonds or ribs. In the erection of these and other types of iireproof construction extensive false work is necessary, which adds greatly to the cost and time required for completion. As the use and Working of cement cannot be practiced in seasons of low temperature, progress on buildings is not infrequently brought to a standstill owing t-o the inability of the fireproof men to keep pace `with the other work. A

As my invention is designed to o bviate the4 objections and difficulties noted, l will proceed to describe the manner in which l practice my invention and will designate the points of novelty claimed, making reference to the accompanying drawings, iu Which- Figure l is a view in perspective. Fig. 2 is an elevation of the lintel and flooring. Fig. 3

Serial No. 710,190. (No model.)

illustrates the union between the beam and lintels. Fig. 4L is a detail view of portions of two of the composite filling-slabs and a licorstrip. p

The lintels A reach from beam to beam B and at the ends are routed at C to rest on bottom flanges B' of the beams and underlap the same. The ends of adjacent lintel series make close joint, so that the beam-bottom is completely covered and protected. To. make 6o this joint, the lintel ends are slightly extended at D.

E are bond-wires embedded in the vertical Walls of the lintels, as near as is practicable to their bottom planes. The Wires extend from end to end of each lintel and are preferably of' wavering outline to make mechanical as Well as chemical union with the composite lintel-body, rendering it impossible for the wires to pull out in case of a breakdown or 7o compression of the lintel, as in such event they will remain intact until the sustained load exceeds their tensile strength. The depth of the lintel gives thereto, independent of the bond-Wires, great strength both horizontally and vertically; but When reinforced by the steel bond it has ample capacity for heavy loads on Wide bays.

I do not limit myself to wire as a bond agent, as metal of other forms may be used.

' The lntels are molded of a composition composed of cement and ground cinder and in practice are manufactured sufficiently in advance of their erection to permit of thorough drying and solidifyin g. They are then capable of handling with comparative ease and may be rapidly positioned one against the other.

F are slabs molded of cement and ground cinder which extend transverse the lintels, 9o breaking joints therewith and nailed thereto, thus performing the double function of a filler between the flooring and lintels and a transverse binder for the structure. The slabs covering the beam-tops are recessed at F to lit down thereover, and the slab edges are beveled to confine, Without nailing, strips G,

to which iiooring H is nailed. As the slabs are prepared ready for laying before being brought to the building, they may be pnt in Ico position in all seasons, and the laying of flooring may immediately follow erection ot' the lintels.

Having thus fully described my invention,

what I claim as new, and desire to secure byi Letters Patent, is-

l. In reproof construction, the combination of the lintels, and composite slabs resting on and nailed to the lintels, the slabs eX- tending transverse the lintels and breaking joints therewith and forming a transverse bond.

2. In reproof construction, long-length lintels formed of cement and ground einder, longitudinal metallic bonds embedded in the lintels adjacent their lower edges, the lintel JOHN H. LAING.

Witnesses:

* J. M. NESBIT,

H. R. LEAN. 

